/
camera_device.py
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/
camera_device.py
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import os, uuid, threading, itertools, datetime
import numpy
import requests
import bluesky
from ophyd import Device, Component, Signal, DeviceStatus
from ophyd.areadetector.filestore_mixins import resource_factory
# See for resource_factory docstring
# https://github.com/bluesky/ophyd/blob/b1d258a36c974013b6e3ac8ee7112ed876b7653a/ophyd/areadetector/filestore_mixins.py#L70-L112
import requests
from PIL import Image, ImageFont, ImageDraw
from io import BytesIO
from subprocess import Popen, PIPE, call, run
import fcntl
from BMM import user_ns as user_ns_module
user_ns = vars(user_ns_module)
from BMM.functions import now
from BMM.logging import report
from BMM.user_ns.bmm import BMMuser
def annotate_image(imagefile, text):
bluesky_path_as_list = bluesky.__path__[0].split('/') # crude, but finds current collection folder
font_path = os.path.join('/', *bluesky_path_as_list[:4], 'lib', 'python3.7', 'site-packages', 'matplotlib', 'mpl-data', 'fonts', 'ttf')
img = Image.open(imagefile)
width, height = img.size
draw = ImageDraw.Draw(img, 'RGBA')
draw.rectangle(((0, int(9.5*height/10)), (width, height)), fill=(255,255,255,125))
font = ImageFont.truetype(font_path + '/DejaVuSans.ttf', 24)
draw.text((int(0.2*width/10), int(9.6*height/10)), text, (0,0,0), font=font)
img.save(imagefile)
def xas_webcam(filename=None, **kwargs):
XASURL = 'http://xf06bm-cam6/axis-cgi/jpg/image.cgi'
CAM_PROXIES = {"http": None, "https": None,}
if filename is None:
filename = os.environ['HOME'] + '/XAS_camera_' + now() + '.jpg'
r=requests.get(XASURL, proxies=CAM_PROXIES)
Image.open(BytesIO(r.content)).save(filename, 'JPEG')
if 'annotation' in kwargs:
annotate_image(filename, kwargs['annotation'])
report('XAS webcam image written to %s' % filename)
def xrd_webcam(filename=None, **kwargs):
XRDURL = 'http://xf06bm-cam6/axis-cgi/jpg/image.cgi'
CAM_PROXIES = {"http": None, "https": None,}
if filename is None:
filename = os.environ['HOME'] + '/XRD_camera_' + now() + '.jpg'
r=requests.get(XRDURL, proxies=CAM_PROXIES)
Image.open(BytesIO(r.content)).save(filename, 'JPEG')
if 'annotation' in kwargs:
annotate_image(filename, kwargs['annotation'])
report('XRD webcam image written to %s' % filename)
def analog_camera(filename = None,
sample = None,
folder = os.environ['HOME'],
device = '/dev/video2',
camera = 0,
skip = 30,
frames = 5,
brightness = 30,
x = 320,
y = 240,
linecolor = 'white',
nocrosshair = True,
quiet = False,
reset = False,
usbid = '534d:0021',
title = 'NIST BMM (NSLS-II 06BM)',
timestamp = '%Y-%m-%d %H:%M:%S'):
"""A function for interacting with fswebcam in a way that meets the
needs of 06BM.
Parameters
----------
folder : str
location to drop jpg image [$HOME]
device : str
char device of camera [/dev/video0] should be set to something in /dev/v4l/by-id/
camera : int
camera number[0]
skip : int
number of frames to skip waiting for camera to wake up [30]
frames : int
number of frames to accumulate in image [5]
brightness : int
brightness setting of camera as a percentage [30]
x : int
middle of image, in pixels, X-location of cross hair [320]
y : int
middle of image, in pixels, Y-location of cross hair [240]
linecolor : str
color of cross hair lines [white]
nocrosshair : bool
flag to suppress cross hair [True]
quiet : bool
flag to suppress screen messages [False]
usbid : str
vendor and product ID of camera of AV to USB device at 06BM [534d:0021]
title : str
title string for fswebcam banner [NIST BMM (NSLS-II 06BM)]
filename : str
output file name
"""
USBDEVFS_RESET= 21780
if reset is True:
if not quiet: print("resetting video device")
try:
lsusb_out = Popen("lsusb | grep -i %s" % usbid,
shell=True,
bufsize=64,
stdin=PIPE,
stdout=PIPE, close_fds=True).stdout.read().strip().split()
bus = lsusb_out[1].decode('UTF-8')
device = lsusb_out[3][:-1].decode('UTF-8')
print("/dev/bus/usb/%s/%s"%(bus, device))
f = open("/dev/bus/usb/%s/%s"%(bus, device), 'w', os.O_WRONLY)
fcntl.ioctl(f, USBDEVFS_RESET, 0)
sleep(1)
except Exception as msg:
print("failed to reset device:", msg)
quiet = ''
if quiet: quiet = '-q '
if filename is None:
filename = folder + '/analog_camera_' + now() + '.jpg'
if sample is not None and sample != '':
title = title + ' - ' + sample
if 'xf06bm-ws3' in BMMuser.host:
command = ['fswebcam', quiet,
'-i', f'{camera}',
'-d', device,
'-r', f'{x}x{y}',
'--title', title,
'--timestamp', timestamp,
'-S', f'{skip}',
'-F', f'{frames}',
'--set', f'brightness={brightness}%',
filename]
else:
command = ['ssh', 'xf06bm@xf06bm-ws3', f"fswebcam {quiet}-i {camera} -d {device} -r {x}x{y} --title '{title}' --timestamp '{timestamp}' -S {skip} -F {frames} --set brightness={brightness}% '{filename}'"]
run(command)
#command = f"fswebcam {quiet}-i {camera} -d {device} -r {x}x{y} --title '{title}' --timestamp '{timestamp}' -S {skip} -F {frames} --set brightness={brightness}% '{filename}'"
#system(command)
#command = f"fswebcam {quiet}-i {camera} -d {device} -r {x}x{y} --title '{title}' --timestamp '{timestamp}' -S {skip} -F {frames} --set brightness={brightness}% '{filename}'"
#system(f'ssh xf06bm@xf06bm-ws3 "{command}"')
report('Analog camera image written to %s' % filename)
## crosshairs
#if not camera.nocrosshair:
# camera.crosshairs()
try:
from bluesky_queueserver import is_re_worker_active
except ImportError:
# TODO: delete this when 'bluesky_queueserver' is distributed as part of collection environment
def is_re_worker_active():
return False
class BMM_JPEG_HANDLER:
def __init__(self, resource_path):
# resource_path is really a template string with a %d in it
self._template = resource_path
def __call__(self, index):
filepath = self._template % index
return numpy.asarray(Image.open(filepath))
# if not is_re_worker_active():
# user_ns['db'].reg.register_handler("BMM_USBCAM", BMM_JPEG_HANDLER)
# user_ns['db'].reg.register_handler("BMM_XAS_WEBCAM", BMM_JPEG_HANDLER)
# user_ns['db'].reg.register_handler("BMM_XRD_WEBCAM", BMM_JPEG_HANDLER)
# user_ns['db'].reg.register_handler("BMM_ANALOG_CAMERA", BMM_JPEG_HANDLER)
class ExternalFileReference(Signal):
"""
A pure software signal where a Device can stash a datum_id
"""
def __init__(self, *args, shape, **kwargs):
super().__init__(*args, **kwargs)
self.shape = shape
def describe(self):
res = super().describe()
res[self.name].update(dict(external="FILESTORE:", dtype="array", shape=self.shape))
return res
class BMMSnapshot(Device):
image = Component(ExternalFileReference, value="", kind="normal", shape=(1080, 1920, 3))
def __init__(self, *args, root, which, **kwargs):
super().__init__(*args, **kwargs)
self._root = root
self._acquiring_lock = threading.Lock()
self._counter = None # set to an itertools.count object when staged
self._asset_docs_cache = []
self._annotation_string = ''
self.device = None # needed for the fswebcam interface
self.x = 640
self.y = 480
self.brightness = 30
if which.lower() =='xrd':
self._SPEC = "BMM_XRD_WEBCAM"
self._url = 'http://xf06bm-cam5/axis-cgi/jpg/image.cgi'
elif which.lower() == 'xas':
self._SPEC = "BMM_XAS_WEBCAM"
self._url = 'http://xf06bm-cam6/axis-cgi/jpg/image.cgi'
elif 'usb' in which.lower():
self._SPEC = "BMM_USBCAM"
self._url = None
else:
self._SPEC = "BMM_ANALOG_CAMERA"
self._url = None
def current_folder(self):
#folder = os.path.join(BMMuser.folder, 'raw', datetime.datetime.now().strftime("%Y/%m/%d/%H"))
folder = os.path.join(BMMuser.folder, 'assets', '', self.name, datetime.datetime.now().strftime("%Y/%m/%d"))
if not os.path.isdir(folder):
os.makedirs(folder)
return folder
def stage(self):
#self._rel_path_template = f"path/to/files/{uuid.uuid4()}_%d.ext"
self._rel_path_template = f"{uuid.uuid4()}_%d.jpg"
self._root = self.current_folder()
resource, self._datum_factory = resource_factory(
self._SPEC, self._root, self._rel_path_template, {}, "posix")
self._asset_docs_cache.append(('resource', resource))
self._counter = itertools.count()
# Set the filepath
return super().stage()
def collect_asset_docs(self):
yield from self._asset_docs_cache
self._asset_docs_cache.clear()
def unstage(self):
self._counter = None
self._asset_docs_cache.clear()
return super().unstage()
def _capture(self, status, i):
"This runs on a background thread."
try:
if not self._acquiring_lock.acquire(timeout=0):
raise RuntimeError("Cannot trigger, currently trigggering!")
filename = os.path.join(self._root, self._rel_path_template % i)
# Kick off requests, or subprocess, or whatever with the result
# that a file is saved at `filename`.
if self._SPEC == "BMM_XAS_WEBCAM" or self._SPEC == "BMM_XRD_WEBCAM":
CAM_PROXIES = {"http": None, "https": None,}
r=requests.get(self._url, proxies=CAM_PROXIES)
im = Image.open(BytesIO(r.content))
im.save(filename, 'JPEG')
#print(f'w: {im.width} h: {im.height}')
self.image.shape = (im.height, im.width, 3)
annotation = 'NIST BMM (NSLS-II 06BM) ' + self._annotation_string + ' ' + now()
annotate_image(filename, annotation)
elif self._SPEC == "BMM_USBCAM":
if self.name == 'usbcam1':
u=user_ns['usb1'].image.array_data.get().reshape((1080,1920,3))
else:
u=user_ns['usb2'].image.array_data.get().reshape((1080,1920,3))
im = Image.fromarray(u)
im.save(filename, 'JPEG')
self.image.shape = (im.height, im.width, 3)
annotation = 'NIST BMM (NSLS-II 06BM) ' + self._annotation_string + ' ' + now()
annotate_image(filename, annotation)
else:
analog_camera(device=self.device, x=self.x, y=self.y, brightness=self.brightness,
filename=filename, sample=self._annotation_string, folder=self._root, quiet=True)
self.image.shape = (self.y, self.x, 3)
self._annotation_string = ''
datum = self._datum_factory({"index": i})
self._asset_docs_cache.append(('datum', datum))
self.image.set(datum["datum_id"]).wait()
except Exception as exc:
status.set_exception(exc)
else:
status.set_finished()
finally:
self._acquiring_lock.release()
def trigger(self):
status = DeviceStatus(self)
i = next(self._counter)
thread = threading.Thread(target=self._capture, args=(status, i))
thread.start()
return status
def snap(which, filename=None, **kwargs):
if which is None: which = 'XAS'
if which.lower() == 'xrd':
xrd_webcam(filename=filename, **kwargs)
elif 'ana' in which.lower() :
analog_camera(filename=filename, **kwargs)
else:
xas_webcam(filename=filename, **kwargs)